Of course there are good reasons to want to track documents to prevent things like fraud, industrial espionage, and so forth. But your marketing specifically targets leakers, and leakers are often motivated to expose to the public secrets that corporate actors would prefer to keep hidden, perhaps illegally, eg the Panama papers or records of pollution violations. It seems that you're inadvertently or unintentionally offering 'retaliation as a service.'
A business competitor wouldn't care about "real evidence", only that the information is useful. The only institution that I can think of that wants "evidence" is the court system.
Are you saying your tool is specifically intended to discourage people from submitting evidence to courts and the police?